Delivery of adjustable quantities of materials

Abstract

A delivery device and method making use of a plunger which can be controllable reciprocated within a housing to regulate the amount of material expelled from the housing. The plunger includes an adjustable stop collar which can be adjustably positioned, preferably by depressing the sides of the collar. In addition, a piston within the housing is sealably releasable from the plunger.

What is claimed is: 
     
       1. A delivery device comprising a housing having an outlet for material to be delivered therefrom: a plunger which can be reciprocated within said housing and means for controlling the extent of reciprocation of said plunger to regulate the amount of material expelled and delivered from said outlet wherein the controlling means is a stop means comprising an ajustably positioned collar surrounding said plunger and located externally of said housing wherein said collar includes compressible side portions to assist in fixing the adjustment position of said collar.